◄ IMPORTANT UPDATE ►
The attached Technical Instructions have been updated. Refer to the details below.
DATE

TOPIC

07/17/2025

Updated current Cal ID’s and NEW Cal ID have been updated to reflash
Vehicles that could not be reflashed before that had field fix software applied prior to
campaign launch.

The most recent update in the attached TI will be highlighted with a red box.

Please review this notification with your staff to assure that all relevant personnel have been briefed regarding
this subject.
Thank you for your cooperation.

TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN 24LC04
REPROGRAMMING FOR ENGINE ELECTRONIC CONTROL UNIT
CERTAIN 2022, 2023 and 2024 LX600 VEHICLES

The repair quality of covered vehicles is extremely important to Lexus. All dealership technicians
performing this repair are required to successfully complete the most current version of the ELearning course “Safety Recall and Service Campaign Essentials”. To ensure that all vehicles have the
repair performed correctly; technicians performing this repair are required to currently hold at least
one of the following certification levels:
•

LIC206A - Electrical Repair 1

It is the dealership’s responsibility to select technicians with the above certification level or greater to
perform this repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation
schedules to ensure there are properly trained technicians available to perform this repair at all times.

1

I.

OPERATION FLOW CHART

The flow chart is for reference only. DO NOT use it in place of the full technical instructions. Follow ALL
steps as outlined in the full technical instructions to confirm the campaign is completed correctly.

2

II. IDENTIFICATION OF AFFECTED VEHICLES
1.

CHECK VEHICLE FOR CAMPAIGN ELIGIBILITY
a) Compare the vehicles VIN to the VIN listed on the Repair Order to ensure they match.
b) Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and that it has not
already been completed.

HINT:
TMNA warranty will not reimburse dealers for repairs completed on vehicles that are not affected or
were previously completed, even by another dealer.

III. PREPARATION
A. TOOLS & EQUIPMENT
•
•
•

L-SB-0001-18 Rev. 2
DCA-8000 Battery Diagnostic Station
Techstream ADVi / Techstream 2.0 / Techstream Lite

BACKGROUND

IV. SAFETY PRECAUTIONS
CRITICAL INFORMATION - READ THOROUGHLY

An ECU could be damaged if an error occurs in the communication while reprogramming the ECU. Confirm all work is
performed as described in these instructions.

3

1.

STABILIZE THE POWER TO THE PERSONAL COMPUTER SIDE
a) Be sure to connect the personal computer to an external AC
power supply.

NOTICE:
The ECU could be damaged if the battery voltage of the personal
computer drops while reprogramming.
b)

Turn off the screen saver and power saving mode of the personal
computer so that the power to the hard disk is kept supplied.

NOTICE:
If the screen saver or power saving mode launches while
reprogramming, the communication may be disconnected,
resulting in the damage of the ECU.
c)

DO NOT block the ventilation opening for the cooling fan of the
personal computer.

NOTICE:
If the ventilation opening for the cooling fan is blocked with a
sheet cover or the like, the personal computer may be heated
excessively, causing the operation of the personal computer to
stop.
Due to the stop of the operation, the communication for
reprogramming signals could be stopped, resulting in the damage
of the ECU.

V. ENGINE SYSTEM CALIBRATION ID VERIFICATION
1.

CHECK FOR DTC’S
a) Using a GTS+, click the “Health Check” button on the Main Menu.
HINT:
This Campaign covers only the software update to the Engine
System, as detailed in these instructions. It does not cover the
diagnosis or replacement of any other systems on the vehicle.

4

2.

CHECK CURRENT CALIBRATION
a) Locate the “Update” column of the “Calibration Information” for the Engine system on the "Health Check
Result" screen.
b) Determine the status of an available update; indicated by a YES or NO.
HINT:
If the CIDs indicate ‘Yes’, proceed with the update procedure.

Yes

Proceed to section VII. Vehicle
preparation on page 4.

Is there an update available for
the Engine System?

No

Campaign complete. Return the
vehicle to the customer.

◄ CRITICAL MESSAGE ►
It is critical that L-SB-0001-18 Rev. 2 in addition to the Technical Instructions for this SSC] are followed. This TSB
outlines all steps necessary to prevent reprogramming failure. Toyota will not provide reimbursement coverage for
reprogramming failures if this TSB is not followed. If you have a reprogramming failure that requires ENGINE CONTROL
COMPUTER replacement and the Technical Instructions and TSB were followed correctly, please create a case with the
Technical Assistance Hotline documenting all information related to the failure. If sufficient reporting is received related
to re-flash failure, there will be consideration for reimbursement.

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VI. VEHICLE PREPARATION
1.

VEHICLE PREPARATION
a) Confirm the following conditions:
• Vehicle in the IG position (READY
OFF).
•
•

•
•

Transaxle in Park.
Parking brake engaged.

•

Turn off all electrical accessories (i.e. climate control,
audio system, etc.)
Headlight switch in the DRL OFF position. (w/ DRL
OFF position)
Windshield wiper switch in the OFF position.

b)

When the vehicle has no “OFF position” in the light control
switch:
1) Turn the IG ON.
2) Set the light control switch to the AUTO position and make sure
that the exterior lights are turned on.
3) Light up the automatic light control sensor with work light to
keep the exterior lights turned off.

2.

CONNECT THE 12V BATTERY TO A POWER SUPPLY
a) Connect the DCA-8000 or other type of a power supply (not a battery charger) to the 12V battery.
b) Tap the Reflash icon from the Main Menu screen of the DCA-8000.
A power supply MUST be used during reprogramming. ECU damage will occur if the battery
voltage is not properly maintained during this re-flash procedure.

NOTICE:
A power supply must be connected directly to the 12V battery terminals and NOT the remote jump
posts under the hood (if equipped).

3.

VERIFY GTS+ SETUP
a) Verify that the GTS+ meets the following conditions:
•
•
•

The latest version of software is loaded.
The GTS+ battery is fully charged. If not, connect the GTS+ to a 120V source.
The DLC III cable is in good condition.

The GTS+’s battery voltage must also be maintained during the re-flash procedure. If necessary,
plug the GTS+ into a 120V outlet during this procedure.
NOTICE:
If the GTS+ communication with the vehicle fails during the re-flash procedure, the Engine Control
Computer will be damaged.

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VII. UPDATE CALIBRATION
1.

CONFIRM THE CALIBRATION ID
a) Confirm the current calibration ID in the Engine System.

The calibration IDs to re-flash in this campaign are as shown in the table below.

System

Engine

Engine Control Computer Calibrations
Current Calibration ID
896636A13000
896636A13100
896636A13200
896636A13300
896636AK3100
896636AK3000
896636AL7000
896636AL7100

New Calibration ID

896636AK3200

896636AL7200

NOTICE:
If the Engine Control Computer has the New CIDs listed on the table, no update is necessary. Please
note that the campaign should only be closed when the vehicle has the New Calibration IDs above.

2.

REFLASH THE ENGINE CONTROL COMPUTER
a) Click “Yes” on the “Health Check Results” screen or follow the links on the table above the begin the
reflash process.
NOTICE:
Reflash failure should be extremely rare and can be avoided by following all instructions and
reprogramming best practices.

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VIII.
1.

COMPLETE REPAIR
DISCONNECT THE DCA-8000

2.

3.

PERFORM VERIFICATION HEALTH CHECK
a) Using a GTS+, click the “Health Check” button on the Main
Menu.
b) Clear DTC’s that may have set during the re-flash procedure.
c) Re-run the Health Check to confirm that no DTC’s reappear.
THIS VERIFICATION HEALTH CHECK IS
NECESSARY to update the results and CIDs
to the National database.

CONFIRM CID UPDATE
a) On the Stored Data tab, confirm the following for the Engine System:
•
•

The Calibration number has the “New CID” number.
The Update column says “No”.

Confirm the CIDs has been updated successfully to the NEW CIDs by someone other than the
individual who performed the repair. Refer to page 5.

4.

PRINT CUSTORMER HEALTH CHECK REPORT
a) From the Stored Data tab, select the Customer Health Check
Report button (TIS will launch when button is pressed).
b) Log in to TIS.
c) Input Vehicle Mileage and Repair Order number.
d) Check the “Performed” campaign button for the applicable
campaigns.
e) Select the Report button.

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f)
g)
h)

Confirm Customer Health Check Report information is correct.
Print Customer Health Check Report from TIS.
Sign and provide to the customer.
◄ VERIFY REPAIR QUALITY ►

-

Confirm the reflash completes successfully.
Confirm there are no DTCs after the Calibration update.
If you have any questions regarding this update, please contact your area representative.

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